Spacing table



A. WINTER IV Sept. 6, 1966 SPACING TABLE 5 Sheets-Sheet 1 Filed July 9, 1963 FIG.I

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FIG.3

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FIG.5

A. WINTER IV SPACING TABLE Sept. 6, 1966 5 Sheets-Sheet 5 Filed July 9, 1965 FIG.7

INVENTOR.

HEUS WINTER II A TORNEY.

United States Patent 3,270,591 SPACING TABLE Alpheus Winter IV, Fairfield, C0nn., assignor to Winter Products, Inc., Fairfield, Conn, a corporation of Connecticut Filed July 9, 1963, Ser. No. 293,702 Claims. (Cl. 7764) This invention relates to work-supporting devices and particularly to an improved spacing .table adapted to move a workpiece thereon to any point in a plane.

The principal object of the invention is to provide a spacing table that is of simple and inexpensive construction.

Another object of the invention is to provide such a spacing table in which extreme accuracy of movement along intersecting axes is achieved by an inexpensive construction.

Still another object of the invention is to provide such a spacing table embodying a presettable positioning element for establishing a predetermined program of locations on a workpiece where drilling or similar operations are to be performed.

Another object of the invention is to provide such a spacing table in which the predetermined program can be stored for subsequent use.

Still another object of the invention is provide such a spacing table in which the program of locations can be preset away from the spacing table.

Still another object of the invention is to provide such a spacing table embodying a simple fluid-operated circuit for rapidly positioning the table.

Another object of the invention is to provide such a spacing table in which the individual preset locations of the program can be chosen at will by the operator.

In one aspect of the invention, a work-supporting table capable of being moved simultaneously along intersecting paths may comprise a base plate having longitudinally extending groove means on its top face including spaced, parallel walls, within which hardened and ground rods are fixed such that a major portion of the rods, diameterwise, extends above said top surface. An intermediate plate may include groove means in its bottom surface including spaced, parallel walls for mating with the rods on the base, and may have hardened and ground rods in groove means in its top face at right angles to the groove means in its bottom face, the latter rods being mounted identically with those on the base. A top plate may include groove means on its bottom face including spaced, parallel walls that mate with the rods on the intermediate plate. In assembled condition, the intermediate plate can be moved along the bottom plate rods and the top plate moved along the intermediate plate rods to provide universal movement of the top plate.

In another aspect of the invention, the rods on the base and intermediate plates may extend substantially beyond the ends of the plate to which they are attached. Piston and cylinder means may be supported at the ends of the respective pairs of rods, and they may be connected to the plate that is adapted to slide on said pairs of rods. Accordingly, admission of pressure fluid to selected ends of said cylinder and piston means can effect the universal movement of the top plate.

In still another aspect of the invention, a turret may be mounted on the intermediate plate beneath the top plate and at the center thereof. It may be arranged for step-by-step indexing movement about the center of the intermediate plate. A plurality of threaded rods may extend radially outwardly from said turret, and there may be two sets of such rods at diiferent elevational positions about said turret.

In a still further aspect of the invent-ion, adjustable stop- "ice ping means may be threaded onto the lower elevational threaded turret rods for cooperation with abutment means mounted at the ends of the rods attached to the base of the table, and similar stopping means may be threaded onto the upper elevational threaded turret rods for cooperation with abutment means mounted on the .top plate of the table.

In another aspect of the invention, the turret may be mounted on the intermediate member by a removable bolt, whereby the turret can be preset away from the table, and a dial may be attached to the turret so that an operator can identify the position to which the table will be moved when the piston and cylinder means are activated.

In still another aspect of the invention, a fixture may be provided for facilitating the setting of the turret away from the table. It may comprise a base including means for supporting the turret in a manner similar to the way it is supported on the intermediate plate. It also may include accurately spaced keyways for receiving abutment means similar to that attached to the table, except that the instant means may be connected to a micrometer or dial indicator means for accurately setting the adjustable stop on the turret rods for a given program.

The above, other objects and novel features of the spacing table will become apparent from the following specification and accompanying drawings which are merely exemplary.

In the drawings:

FIG. 1 is a top plan view of a spacing table to which the principles of the invention have been applied;

FIG. 2 is a sectional elevational view taken substantially along line 22 of FIG. 1;

FIG. 3 is a sectional elevational view taken substantially along line 33 ofFIG. 1;

FIG. 4 is a perspective exploded view of the table forming part of the invention;

FIG. 5 is an elevational sectional view of a fixture used in the presetting of a program for the apparatus shown in FIGS. 1 to 4;

FIG. 6 is a View of a detail of the invention; and

FIG. 7 is a workpiece adapted to be drilled by a program preset on the apparatus of this invention.

Referring to the drawings, the principles of the invention are shown as applied to a spacing table including a stationary base 10. Referring to FIG. 4, the base plate 10 may be provided with groove means having spaced, parallel walls, and in the embodiment disclosed they are shown as parallel, spaced, longitudinally extending V- grooves 11 and 12 within which may be rigidly fixed, by recessed screws 13, hardened and ground round stock 14 that extends a substantial distance beyond the ends of the base plate 10. Of course, the ground stock may be other than round. The angle of the V-grooves 11, 12 and the diameter of the ground stock or rods v14 are such that when assembled, a major portion (diameterwise) of the rods 14 lies above the top surface of base plate 10. Base 10 is shown recessed at 15 (FIG. 3) for clearance purposes and to conserve space.

An intermediate plate 16 may be provided on its bottom surface 17 with parallel spaced, longitudinally extending V-grooves 18 adapted to mate with rods 14 and to form way bearings that are capable of sliding along rods 14. The top surface of intermediate plate 16 may include spaced, parallel, transversely extending V-grooves 19 at right angles to grooves 18, and they may have fixed within them, by screws 20, rods 21 identical with and mounted the same as rods 14 in base plate 10. A top plate 22 may be provided with spaced, parallel, transversely extending V-grooves 23 adapted to mate with and slide along rods 21 in the same way that grooves 18 mate with and slide along rods 14.

In order to prevent the lifting of the intermediate plate 16 from the base plate 10, brackets 23 may be attached to plate 16 and may be keyed to plate by a key 24 such that when plate 16 slides along rods 14, keyway 25 slides along key 24 which latter extends along opposite sides of base plate 10. In a similar fashion, brackets 26 and keys 27 may be provided between top plate 22 and intermediate plate 16 for the same reason.

Referring to FIG. 2, the ends of rods 14 may have brackets 28 and 29 attached thereto for supporting abutting means 30 for a purpose which will be described later. An angle member 31 is attached to bracket 29, and the blind end of a cylinder 32 is fixed thereto. The piston rod 33 of cylinder 32 is fixed to bracket 26 on the side of intermediate plate 16 adjacent cylinder 32. Accordingly, admitting pressure fluid to the rod end of cylinder 32 while exhausting t] e blind end will cause intermediate plate 16, and with it top plate 22, to slide along rods 14 in a rightward direction (FIG. 2). Also, admitting pressure fluid to the blind end while exhausting the rod end of cylinder 32 will move the assembly leftwardly.

Referring to FIGS. 1 and 3, although one cylinder 34 will suffice, two have been shown, one at each end of plate 22, in order to ensure maximum accuracy of the device. To this end, separate plates 35 are attached to the forward end of each of the'rods 21, and the blind end of cylinder 34 is rigidly fixed to each of said plates. The piston rod 36 of each cylinder 34 is fixed to one of the forward corners of top plate 22. Accordingly, admission of pressure fluid to the rod ends of cylinders 34 simultaneously while exhausting their blind ends will move plate 22 forwardly to the position shown in FIG. 1; and admission of pressure fluid to the blind ends while exhausting the rod ends of cylinders 34 will move top plate 22 rearwardly.

In order to provide a program of preset positions to which top plate 22 is to be moved, a turret 37 is removably mounted for rotation on, and movement with, the intermediate plate 16. Thus, plate 16 is bored and counterbored from its bottom face to provide a shoulder 38 against which a flange 39 of a circular disc 40 abuts. Cap screws 41 pass through arcuately shaped slots in disc 40 to provide limited angular adjustment of disc 40 for a purpose to be described later. Turret 37 may be cylindrical in shape and may revolve freely about a bearing bushing 42 that is secured by a removable screw 43 to the disc 40 at its center. The turret 37 may be provided with sets of radially extending, threaded rods 44. In the embodiment shown, two sets of rods 44 are provided at separate elevations for a purpose which presently will appear. There may be any number of these rods about turret 37, the only limitation being their necessary separation to clear abutting means, which will be explained. The rods 44 do not bottom in the threaded holes of turret 37 and are held in place therein by set screws 45 in threaded holes directly in line with each rod. 44. A nylon ball or lead ball 46 may be located between the inner ends of set screws 45 and rods 44 for a purpose to be described later. Each rod 44 may have an abutting nut and lock nut means 47 which can be located at'any desired position along its corresponding rod 44 and locked thereto.

In order to distinguish between the rods 44 for right and left motion control from the rods 44 for forward and rear motion control, abutment means 30 (FIG. 2) for right and left control cooperate with the lower elevational set of rods 44, and abutment means 48' (FIG. 3) cooperates with the higher elevational set of rods 44. Referring to FIG. 2, an abutment means 30 comprises a tubular element 48 that is threaded into a threaded hole within bracket 28. A nut head 49 is provided on the end of tubular element 48 for adjusting it, and it is held in adjusted position by a set screw 50 between which an element 48 may be a nylon or lead ball. The

internal diameter of element 48 is such that it freely receives the ends of rods 44, but the nuts 47 thereon abut the end of a replaceable tubular member 71 adapted to be telescopically connected to element 48 to limit the travel of top plate 22 leftwardly. There is an identical abutting tubular element 51 mounted in bracket 29. The use of two elements 48 and 51, one on each side of the table, lessens the required length of rods 44 for a given total leftward and rightward movement of top plate 22. Such construction also reduces the overall size of the apparatus for a given stroke.

Since the turret 37 is mounted on intermediate plate 16 and moves only left and right, the abutment means 30 are mounted on stationary brackets 28, 29 fixed to stationary rods 14. However, plate 22 move-s leftwardly and rightwardly with turret 37 and plate 1 6, and moves also forwardly and backwa-rdly. Accordingly, abutment means 48 (-FIG. 3) is mounted on an extending car 52 (FIG. 1) at the center of plate 2 2. A member 5 3 extends through a hole in ear 52 and is removably fixed therein by a set screw 54. Member 53 depends below plate 22 and threadingly receives the abutment means 4 8 which is similar to abutment means 30, except in the form shown it lacks the replaceable tubular element 71.

In order for the operator to properly index the turret 37, a small hole 55 is provided in plate 22. A dial 56 (FIG. 3) may be fixed to turret 37 and indie/es may be provided about its peripheral edge that will appear through hole 55 when plate 22 is in its datum position as shown in FIG. 1, i.e., at its forwardmost stroke. Of course, the corresponding rods 44 for the movements along the two axes are 90 apart, but this is a consideration requiring attention during'the presetting of turret 37 as will be explained later.

A hole 57 also may be located in plate 22. When it is desired to remove turret 37 for presetting a program of positions on it, the set screw 54 is loosened, and member 53 with abutment means 48 is removed. Top plate 22 is then move-d rearwardly until hole 57 is over the center of turret 37. The bolt 43 is then removed, after which turret 37 with its rods 44 and dial 56 can be slid forward and removed from the assembly.

Referring to FIG. 5, a fixture 58 may be provided for facilitating the setting of nut means 47 on rods 44 of the turret 37. It may comprise a base 59 having a threaded hole and bolt 60 identical with bolt 43 on which the turret 37 can be mounted for rotation. A spring pressed ball detent 61 may be located in base 59 so as to register with the holes receiving set screws 45 in each face of the turret. This provides an index locating means to ensure the position of rods 44 along base 5 9.

The base also may include a plurality of slots 62, 62a, 62b, 62c and 62d adapted slidin-gly to receive a tongue 63 on the bottom of a block 64. Block 64 may be bored to receive a micrometer head 65', to one end of which an abutment tube 66, similar to abutment tubes 30 and 48, is attached for axial but not rotary motion as the micrometer head 65 is threaded in and out. Tube 66 is provided with a slot 67 in one wall so that block 64 can be moved transversely along a slot 62 to disengage tube 66 from the preset nut means 47.

, The length of tube 66 and the location of slot 62 are such that with the micrometer head 65 threaded to its zero position and tongue 63 in slot 62, the abutting end of tube 66 will be as close to the periphery of turret 37 as is practical for nut means 47 to be located between said abutting end and said turret periphery. This, then, will be regarded as the zero position. With the micrometer head 65 being a one-inch micrometer, as an example, threading it to its one-inch reading will locate the abutting end of tube 66 exactly one inch radially away from the zero position. With the head 65 again set at zero and tongue 63 in slot 620, the abutting end will be at a distance of one inch from the zero position. Threading the head 65 back to the one-inch reading will move the 5 abutting end of tube 66 two inches from the zero position, and so on throughout the location of slots 62b, and d.

:Referring to FIGS. 2 and 3, it is apparent that the lower rods 44 on turret 3 7 cooperate with the abutment means 30 for X-axis motion; whereas the upper rods 44 cooperate with the abutment means 48' for the Y-axis motion. Furthermore, and referring to FIG. 6, the rods 44 for X and Y coordinates are out of phase and if the turret 37 were transparent, the upper and lower faces would appear as shown for clockwise movement of turret 37.

Referring to FIG. 7, a simple rectangular plate is shown adapted to be drilled in accordance with a program of eight holes dimensioned as shown. Assuming that the apparatus is set for movement of top plate 22 rightwardly along the X-axis and rearwar-dly along the Y-axis from a starting point, a zero-zero position on FIG. 7 preferably is at the upper lefthand corner of FIG. 7 at the intersection of the centerline of hole #3 and the Y centerline of hole #2. The settings of the nut means 47 on rod 44 will be as follows:

With the turret 37 on bolt 60 with its X face up, the nut means 47 on each rod 44 can be quickly set accurately. In locking nut means 47, some slight error may be prdouced. This can be compensated by turning rod 44 and nut means 47 slightly. This is possible due to the nylon or lead ball 46 between set screw 45 and the inner end of rod 44. When all of the X-axis rods 44 have been preset, the turret is reversed with its Y face up, and the rods 44 for it are preset in accordance with the Y values. Only eight positions have been shown. There will, of course, be many more than eight, but this number is ample to explain the principles of the apparatus.

With the turret 37 preset, it is then reinserted on plate 40 and secured in place for rotation about bolt 43. A spring pressed ball detent 68 is located in plate 40, and it cooperates with the holes in the turret face in which the set screws 45 are located and functions to accurately align the rods 44 with the abutting means 30 and 48. Should slight misalignment occur, screws 41 can be loosened and plate 40 turned a slight amount due to the arcuate nature of the slots receiving screws 41, after which said screws can be tightened to maintain perfect alignment between rods 44 and the abutment means.

With the apparatus preset as described, locating means such as pins 69 may be mounted on top plate 22 for orienting the X and Y axes of the program of holes such that they are, respectively, parallel with the X and Y axes of top plate 22. The blank workpiece is then fixedly mounted on top plate 22 against the locating means 69, with the number 1 index position on dial 56 appearing in hole 55 on plate 22; pressure fluid is then admitted to the blind ends of cylinders 32 and 34, exhausting the rod ends, causing the top plate to move to its number 1 position of the program. The drill spindle, if that is what is to be used, is then accurately located over the workpiece at the number 1 location, and the drilling operation is performed.

Then, by admitting pressure fluid to the rod ends of cylinders 32 and 34, while exhausting the blind ends, the plate 22 moves forward and leftward to its datum point, after which the dial 56 can be turned'to any number in the program, and upon applying'pressure fluid to the blind ends of cylinders 32 and 34 while exhausting the rod ends, the workpiece is moved to the location corresponding to the number on dial 56 appearing in hole 55.

The above described program had a maximum displacement between locations of 4 /8 inches. The total leftright travel of top plate 22 is 8 inches. If the rods 44 were long enough to accommodate 8 inches, the size of the apparatus would be excessive. Accordingly, the length of the rods 44 is substantially less than 8 inches, and means may be provided to restrict the movement of top plate 22 from a central position of its 8-inch stroke, in only one direction. Thus, removable abutments 70 may be applied to the rods 14 on the side of the center of plate movement opposite that in which movement is desired. Accordingly, the program would be set up with a starting or datum position of the top plate 22 being forward and in the center of its right-left stroke, as distinguished from the dataum position for the example given which is forward and leftward. When this procedure is followed, movement to and from the left-right path datum is occasioned by opposite action of the piston and cylinder mechanism 30. By utilizing this procedure, it is evident that the maximum stroke can be accomplished with a minimum space requirement.

When the preceding procedure is employed, and an operation is to be performed on, or slightly off, the datum at the center of the right-left movement of top plate 22, a condition arises where the turret 37 cannot be indexed because the end of rod 44 is within the abutment tubes 48 or 51 at the zero or datum position. In order to overcome this situation, the abutment means 48 and 51 may comprise a single, removable, hardened tubular end portion 71 for use with the means 48 and 51 that will be effective for the instant portion of the program. The abut-ment means 70, of course, will be on the opposite side of top plate 22 from that of portion 71, and it will be of such length that when pressure fluid is properly applied to the cylinder 32, the forward-rearward centerline of top plate 22 will be offset from the centerline of the top plate 22 will be offset from the centerline of the right-left motion by an amount permitting indexing of the turret 37.

Although the various features of the improved spacer have been shown and described in detail to fully disclose one embodiment of the invention, it will be evident that changes may be made in such details and certain features may be used without others without departing from the principles of the invention.

What is claimed is:

1. In a spacing table, a base plate; an intermediate plate mounted on said base plate for longitudinal movement; a top plate mounted on said intermediate plate for transverse movement along a path at right angles to the path of movement of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; and separate abutment means fixed to said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes.

2. In a spacing table, a base plate; an intermediate plate mounted on said base plate for longitudinal movement; a top plate mounted on said intermediate plate for transverse movement along a path at right angles to the path of movement of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; separate abutment means fixed to said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes; and fluid pressure means connected to said intermediate and top plates for universally moving said top plate to any point within its plane of motion.

3. In a spacing table, a base plate having spaced, parallel, longitudinally extending V-grooves in its upper face; bars fixedly mounted in said V-grooves; an intermediate plate having spaced, parallel, longitudinally extending V-grooves in its lower surface adapted slidingly to mate with the bars fixed to said base plate, said intermediate plate having on its upper face spaced, parallel, transversely extending V-grooves; bars fixed in said transverse grooves; a top plate having on its lower face spaced, parallel, transversely extending V-grooves adapted slidingly to mate with the bars fixed to the upper face of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; and separate abutment means fixed to said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes.

4. In a spacing table, a base plate having spaced, parallel, longitudinally extending V-grooves in its upper face; bars fixedly mounted in said Vgrooves; an intermediate plate having spaced, parallel, longitudinally extending V-grooves in its lower surface adapted slidingly to mate with the bars fixed to said base plate, said intermediate plate having on its upper face spaced, parallel, transversely extending V-grooves; bars fixed in said transverse grooves; a top plate having on its lower face spaced, parallel, transversely extending V-grooves adapted slidingly to mate with the bars fixed to the upper face of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; separate abutment means fixed to said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes; and fluid pressure means connected to said intermediate and top plates for universally moving said top plate to any point within its plane of motion.

5. In a spacing table, a base plate having spaced, parallel, longitudinally extending V-grooves in its upper face; bars fixedly mounted in said V-grooves, said bars extending beyond the ends of said base plate; an intermediate plate having spaced, parallel, longitudinally extending V-grooves in its lower surface adapted slidingly to mate with the bars fixed to said base plate, said intermediate plate having on its upper face spaced, parallel, transversely extending V-grooves; bars fixed in said transverse grooves, said bars extending beyond the transverse dimension of said intermediate plate; a top plate having on its lower face spaced, parallel, transversely extending V-grooves adapted slidingly to mate with the bars fixed to the upper face of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; separate abutment means fixed to said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes; fluid pressure means connected between the ends of said base plate bars and said intermediate plate; and fluid pressure means connected between the ends of said intermediate plate bars and said top plate.

6. In a spacing table, a base plate having spaced, parallel, longitudinally extending V-grooves in its upper face; bars fixedly mounted in said V-grooves, said bars extending beyond the ends of said base plate; an intermediate plate having spaced, parallel, longitudinally extending V-grooves in its lower surface adapted slidingly to mate with the bars fixed to said base plate, said intermediate plate having on its upper face spaced, parallel, transversely extending V-grooves; bars fixed in said transverse grooves, said bars extending beyond the transverse dimension of said intermediate plate; a top plate having on its lower face spaced, parallel, transversely extending V-grooves adapted slidingly to mate with the bars fixed to the upper face of said intermediate plate; turret means removably mounted for rotation on said intermediate platebeneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; and separate abutment means fixed to said base plate and said top plate for cooperation said groove means and the diameter of said bars beingsuch that the major portion of said bars, diameterwise, extends above the upper face of said base plate; an intermediate plate having longitudinally extending groove means in its lower face including spaced, parallel walls adapted slidingly to mate with the bars fixed to said base plate, said intermediate plate having on its upper face transversely extending groove means including spaced, parallel walls; hardened and ground round stock bars fixed in said last mentioned groove means in the same way that the bars are fixed to the base plate; a top plate having on its lower face transversely extending groove means including spaced, parallel walls adapted slidingly to mate with the bars fixed to the upper face of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; and separate adjustable abutment means fixed to said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes.

8. In a spacing table, a base plate having spaced, parallel, longitudinally extending V-grooves in its upper face; hardened and ground round stock bars fixedly mounted in said grooves and extending beyond the confines of said base plate, the construction of said V-grooves and the diameter of said bars being such that the major portion of said bars, diameterwise, extends above the upper face of said base plate; an intermediate plate having spaced, parallel, longitudinally extending V-grooves in its lower face adapted slidingly to mate with the bars fixed to said base plate, said intermediate plate having on its upper face spaced, parallel, transversely extending V- grooves; hardened and ground round stock bars fixed in said last mentioned grooves in the same way that the bars are fixed to the base plate; a top plate having on its lower face spaced, parallel, transversely extending V- grooves adapted slidingly to mate with the bars fixed to the upper face of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; rods containing adjustable stop means extending radially from said turret means in spaced transverse planes; separate abutment means fixed to said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes; fluid pressure means connected between the ends of said base plate bars and said intermediate plate; and fluid pressure means connected between the ends of said intermediate plate bars and said top plate.

9. In a spacing table, a base plate; an intermediate plate mounted on said base plate for longitudinal movement; a top plate mounted on said intermediate plate for transverse movement along a path at right angles to the path of movement of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; elongated members containing adjustable stop means extending radially from said turret means in spaced transverse planes; and separate abutment means on said base plate and said top plate for cooperation with the adjustable stop means in said spaced planes.

10. In a spacing table, a base plate; an intermediate plate mounted on said base plate for longitudinal movement; a top plate mounted on said intermediate plate for transver e movement along a path at right angles to the 9 path of movement of said intermediate plate; turret means removably mounted for rotation on said intermediate plate beneath said top plate; elongated members extending radially from said turret means in spaced transverse planes; and separate abutment members on said base plate and said top plate; and adjustable stop means on one of said members for cooperation with said abutment members in said spaced planes.

References Cited by the Examiner UNITED STATES PATENTS 10 2,674,139 4/1954 Stern 77-63 2,880,632 4/1959 Charlat 77--64 5 FOREIGN PATENTS 635,998 4/1950 Great Britain. 870,625 3/1953 Germany.

10 WILLIAM W. DYER, JR., Primary Examiner.

FRANCIS S. HUSAR, Examiner. 

1. IN A SPACING TABLE, A BASE PLATE; AN INTERMEDIATE PLATE MOUNTED ON SAID BASE PLATE FOR LONGITUDINAL MOVEMENT; A TOP PLATE MOUNTED ON SAID INTERMEDIATE PLATE FOR TRANSVERSE MOVEMENT ALONG A PATH AT RIGHT ANGLES TO THE PATH OF MOVEMENT OF SAID INTERMEDIATE PLATE; TURRET MEANS REMOVABLY MOUNTED FOR ROTATION ON SAID INTERMEDIATE PLATE BENEATH SAID TOP PLATE; RODS CONTAINING ADJUSTABLE STOP MEANS EXTENDING RADIALLY FROM SAID TURRET MEANS IN SPACED TRANSVERSE PLANES; AND SEPARATE ABUTMENT MEANS FIXED TO SAID BASE PLATE AND SAID TOP PLATE FOR COOPERATION WITH THE ADJUSTABLE STOP MEANS IN SAID SPACED PLANES. 